fix(prompts): normalize agent names for continuation injections

src/features/background-agent/manager.test.ts

@@ -889,7 +889,7 @@ describe("BackgroundManager.notifyParentSession - dynamic message lookup", () =>
       .notifyParentSession(task)
 
     //#then
-    expect(capturedBody?.agent).toBe("sisyphus")
+    expect(capturedBody?.agent).toBe("Sisyphus (Ultraworker)")
     expect(capturedBody?.model).toEqual({ providerID: "anthropic", modelID: "claude-opus-4.6" })
 
     manager.shutdown()

src/features/background-agent/manager.ts

@@ -17,6 +17,7 @@ import {
   createInternalAgentTextPart,
 } from "../../shared"
 import { applySessionPromptParams } from "../../shared/session-prompt-params-helpers"
+import { normalizeAgentForPrompt } from "../../shared/agent-display-names"
 import { setSessionTools } from "../../shared/session-tools-store"
 import { SessionCategoryRegistry } from "../../shared/session-category-registry"
 import { ConcurrencyManager } from "./concurrency"
@@ -1829,10 +1830,11 @@ export class BackgroundManager {
         }
 
         const resolvedTools = resolveInheritedPromptTools(task.parentSessionID, tools)
+        const promptAgent = normalizeAgentForPrompt(agent)
 
         log("[background-agent] notifyParentSession context:", {
           taskId: task.id,
-          resolvedAgent: agent,
+          resolvedAgent: promptAgent,
           resolvedModel: model,
         })
 
@@ -1846,7 +1848,7 @@ export class BackgroundManager {
             path: { id: task.parentSessionID },
             body: {
               noReply: !shouldReply,
-              ...(agent !== undefined ? { agent } : {}),
+              ...(promptAgent !== undefined ? { agent: promptAgent } : {}),
               ...(model !== undefined ? { model } : {}),
               ...(variant !== undefined ? { variant } : {}),
               ...(resolvedTools ? { tools: resolvedTools } : {}),

src/hooks/atlas/index.test.ts

@@ -1804,7 +1804,7 @@ session_id: ses_untrusted_999
        // then - should call prompt for sisyphus
        expect(mockInput._promptMock).toHaveBeenCalled()
        const callArgs = mockInput._promptMock.mock.calls[0][0]
-       expect(callArgs.body.agent).toBe("sisyphus")
+       expect(callArgs.body.agent).toBe("Sisyphus (Ultraworker)")
      })
 
     test("should preserve display-name agent in continuation prompt when boulder agent uses display form", async () => {

src/hooks/ralph-loop/continuation-prompt-injector.ts

@@ -8,6 +8,7 @@ import {
 	normalizeSDKResponse,
 	resolveInheritedPromptTools,
 } from "../../shared"
+import { normalizeAgentForPrompt } from "../../shared/agent-display-names"
 
 type MessageInfo = {
 	agent?: string
@@ -69,6 +70,7 @@ export async function injectContinuationPrompt(
 	}
 
 	const inheritedTools = resolveInheritedPromptTools(sourceSessionID, tools)
+	const promptAgent = normalizeAgentForPrompt(agent)
 
 	const launchModel = model
 		? { providerID: model.providerID, modelID: model.modelID }
@@ -78,7 +80,7 @@ export async function injectContinuationPrompt(
 	await ctx.client.session.promptAsync({
 		path: { id: options.sessionID },
 		body: {
-			...(agent !== undefined ? { agent } : {}),
+			...(promptAgent ? { agent: promptAgent } : {}),
 			...(launchModel ? { model: launchModel } : {}),
 			...(launchVariant ? { variant: launchVariant } : {}),
 			...(inheritedTools ? { tools: inheritedTools } : {}),

src/hooks/session-recovery/resume.ts

@@ -1,4 +1,5 @@
 import type { createOpencodeClient } from "@opencode-ai/sdk"
+import { normalizeAgentForPrompt } from "../../shared/agent-display-names"
 import type { MessageData, ResumeConfig } from "./types"
 import { createInternalAgentTextPart, resolveInheritedPromptTools } from "../../shared"
 
@@ -25,6 +26,8 @@ export function extractResumeConfig(userMessage: MessageData | undefined, sessio
 }
 
 export async function resumeSession(client: Client, config: ResumeConfig): Promise<boolean> {
+  const promptAgent = normalizeAgentForPrompt(config.agent)
+
   try {
     const inheritedTools = resolveInheritedPromptTools(config.sessionID, config.tools)
     const launchModel = config.model
@@ -36,7 +39,7 @@ export async function resumeSession(client: Client, config: ResumeConfig): Promi
       path: { id: config.sessionID },
       body: {
         parts: [createInternalAgentTextPart(RECOVERY_RESUME_TEXT)],
-        agent: config.agent,
+        ...(promptAgent ? { agent: promptAgent } : {}),
         ...(launchModel ? { model: launchModel } : {}),
         ...(launchVariant ? { variant: launchVariant } : {}),
         ...(inheritedTools ? { tools: inheritedTools } : {}),

src/hooks/unstable-agent-babysitter/unstable-agent-babysitter-hook.ts

@@ -1,5 +1,6 @@
 import type { BackgroundManager } from "../../features/background-agent"
 import { getMainSessionID, getSessionAgent } from "../../features/claude-code-session-state"
+import { normalizeAgentForPrompt } from "../../shared/agent-display-names"
 import { log } from "../../shared/logger"
 import { createInternalAgentTextPart, resolveInheritedPromptTools } from "../../shared"
 import { isAbortError } from "../../shared/is-abort-error"
@@ -83,7 +84,7 @@ async function resolveMainSessionTarget(
     log(`[${HOOK_NAME}] Failed to resolve main session agent`, { sessionID, error: String(error) })
   }
 
-  return { agent, model, tools: resolveInheritedPromptTools(sessionID, tools) }
+  return { agent: normalizeAgentForPrompt(agent), model, tools: resolveInheritedPromptTools(sessionID, tools) }
 }
 
 async function getThinkingSummary(ctx: BabysitterContext, sessionID: string): Promise<string | null> {